<!doctype html>
<html>
    <head>
        <meta charset="utf-8">
        <title>Airline - ECHARTS-GL</title>
        <meta name="viewport" content="width=device-width, initial-scale=1, user-scalable=no">
        <meta name="apple-mobile-web-app-capable" content="yes"> <!-- Fullscreen Landscape on iOS -->
        <link rel="stylesheet" href="./common.css">
    </head>
    <body>
        <div id="main"></div>
        <script src="../node_modules/echarts/dist/echarts.js"></script>
        <script src="../node_modules/echarts/map/js/world.js"></script>
        <script src="../dist/echarts-gl.js"></script>
        <script src="lib/jquery.min.js"></script>
        <script src="js/commonUI.js"></script>
        <script>
            var chart = echarts.init(document.getElementById('main'));

            $.getJSON('data/flights2.json', function (data) {
                // Airport: [name, city, country, longitude, latitude]
                function getAirportCoord(idx) {
                    return [data.airports[idx][3], data.airports[idx][4]];
                }

                var routes = data.routes.map(function (airline) {
                    return [
                        getAirportCoord(airline[1]),
                        getAirportCoord(airline[2])
                    ];
                });

                chart.setOption({
                    progressiveStep: 5000,
                    backgroundColor: '#003',
                    geo: {
                        map: 'world',
                        left: 0,
                        right: 0,
                        silent: true,
                        roam: true,
                        itemStyle: {
                            normal: {
                                borderColor: '#003',
                                color: '#005'
                            }
                        }
                    },
                    series: [{
                        type: 'linesGL',

                        coordinateSystem: 'geo',

                        blendMode: 'lighter',

                        data: routes,

                        lineStyle: {
                            curveness: 0.2,
                            opacity: 0.05
                        }
                    }]
                });

                window.onresize = chart.resize;

            });
        </script>
    </body>
</html>